SuccessfulKoala55 yes that gives some more information:

` Deleting 11 tasks
Traceback (most recent call last):
File "/root/.cache/pypoetry/virtualenvs/reward-learner-ASq25l3C-py3.10/lib/python3.10/site-packages/clearml/backend_interface/task/task.py", line 711, in _delete
[x for x in filter(None, self._get_image_plot_uris()) if not callback or callback("image_plot", x)]
File "/root/.cache/pypoetry/virtualenvs/reward-learner-ASq25l3C-py3.10/lib/python3.10/site-packages/clearml/backend_interface/task/task.py", line 810, in _get_image_plot_uris
return self._get_all_events(event_type="plot", unique_selector=image_source_selector, batch_size=10000)
File "/root/.cache/pypoetry/virtualenvs/reward-learner-ASq25l3C-py3.10/lib/python3.10/site-packages/clearml/backend_interface/task/task.py", line 2508, in _get_all_events
events_list.update(log_events.response.events)
TypeError: unhashable type: 'dict'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/container/cleanup.py", line 65, in <module>
deleted_task.delete(
File "/root/.cache/pypoetry/virtualenvs/reward-learner-ASq25l3C-py3.10/lib/python3.10/site-packages/clearml/task.py", line 1809, in delete
return super(Task, self)._delete(
File "/root/.cache/pypoetry/virtualenvs/reward-learner-ASq25l3C-py3.10/lib/python3.10/site-packages/clearml/backend_interface/task/task.py", line 733, in _delete
raise self.DeleteError("Task deletion failed: {}".format(ex))
clearml.backend_interface.task.task.Task.DeleteError: Task deletion failed: unhashable type: 'dict' `